In a fanfic, Naruto might power up by having a spiritual awakening. He could connect with the spirits of past Hokages in a deeper way, gaining their knowledge and some of their power. This could enhance his existing jutsu and give him new abilities. Vegeta could power up if he were to face a near - death experience against Naruto. This could trigger a hidden potential within him, like a new type of Super Saiyan form that has unique abilities. He could also fuse with another Saiyan (if there were another Saiyan available in the fanfic's scenario) to create an even more powerful being.
I think young Sasuke would have a very intense reaction. He was so consumed by his hatred for Itachi at that young age. A Sasuke vs Itachi fanfiction would be like a trigger for him. He would be eager to see how the fictional fight is portrayed. If Sasuke in the fanfiction is shown as strong, it might fuel his own ego and make him strive even harder to become powerful. However, if the fanfiction shows Itachi as superior, it could enrage him. He might feel that it undermines his own goal of defeating Itachi and he might even want to find the writer to correct their 'wrong' view.
He might feel anger. Since he was so set on revenge against Itachi, any portrayal that didn't match his view of himself as the victor could make him angry.
Another scenario could be that Naruto and Sasuke discover a new power within themselves during the fight against Kaguya. This new power could be related to their friendship or their connection to the Sage of Six Paths. They then use this power to finally defeat Kaguya.
Most likely Naruto and Sasuke. In the original series, they were already very powerful when they faced Kaguya, and in fanfiction, they could be even more so. Their combined strength and determination usually make them the favorites to win.
Expect their friendship/rivalry to be at the center. The fight is not just about who is stronger physically. It's about their bond. In fanfiction, the writers often play with the idea of whether they can still be friends after such an intense battle. It's a very emotional aspect.
First, make sure you're familiar with the Naruto and Sasuke relationship in the original manga or anime. This will help you better understand and appreciate the fanfiction. Second, don't be afraid to try different genres within the Naruto vs Sasuke fanfiction. It could be action - packed, angsty, or even have a touch of romance. Third, pay attention to the writing style. A clear and engaging writing style can make a huge difference in your reading experience.
Well, it's really hard to say. The Black Swordsman has his own set of skills with the sword and his combat experience. But Dark God Vegeta is extremely powerful with his Saiyan abilities. If they were to fight, it would depend on the context. If it's in a close - quarters combat, the Black Swordsman's sword skills might give him an edge initially. However, Vegeta could quickly adapt and use his energy blasts and super - strength to overpower. In a more open area, Vegeta's long - range attacks would be a big threat to the Black Swordsman.
Obviously, Naruto and Sasuke are going to be the main characters. Their relationship and how it develops after their fight is likely to be the central focus of the fanfic.
In such a fanfiction, Naruto might use his new and improved Rasengan techniques that he's been secretly practicing. Sasuke, on the other hand, could unveil some new Sharingan powers. It could be a battle full of intense jutsu exchanges and emotional turmoil as they both strive to prove themselves in the Chunin Exams.